PREMIUM MATERIAL - Made of superior nylon and mesh fabric materials, soft, washable and durable. WATERRESISTENT - Water repellent and tear resistant, along with delicate workmanship, taking you excellent experience. FOLDABLE & LIGHTWEIGHT - This sling bag can be folded into the interior zipper pouch and expanded to a large backpack, lightweight and portable, great for the gym and travelling. The expanded size is approximately 11.8 x 4.3 x 16.5 inches, the folded size is approximately 6.69" x 5.9" x 1.77" (17 x 15 x 4.5cm). The main pouch can easily hold iPad 4/5/6 or iPad air. Back hidden pocket can keep your wallet, cash and other valuables. ADJUSTABLE & BREATHABLE STRAP - The breathable mesh strap provides fresh and comfortable experience for your shoulder, with adjustable buckle, you can adjust the length according to your needs, very convenient. The length of shoulder strap is 24.4-31.1 inches /62-79cm. The strap pocket is about 7*3.54*1.38"/18*9*3.5cm (H*L*W), ideal for phone?4.7” like iPhone 8. The side pocket can hold the water bottle or umbrella stably. UPGRADED DESIGN - Compared with other ordinary sling bag, this chest bag adopts upgraded design, reinforced strap, flawless strap zipper bag and perfect workmanship make it your best choice! ?After-sales guarantee?If you have any problem with broken or damaged items you purchased, please do not hesitate to contact us with your order ID. We will reply and address your issue within one day, so please purchase with confidence.